package com.gdth.bank.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

public class CrashHandler implements UncaughtExceptionHandler{
	 public static final String TAG = "CrashHandler";  
     
	    //系统默认的UncaughtException处理类   
	    private Thread.UncaughtExceptionHandler mDefaultHandler;  
	    //CrashHandler实例  
	    private static CrashHandler INSTANCE = new CrashHandler();  
	    //程序的Context对象  
	    private Context mContext;  
	    //用来存储设备信息和异常信息  
	    private Map<String, String> infos = new HashMap<String, String>();  
	  
	    //用于格式化日期,作为日志文件名的一部分  
	    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");  
	  
	    /** 保证只有一个CrashHandler实例 */  
	    private CrashHandler() {  
	    }  
	  
	    /** 获取CrashHandler实例 ,单例模式 */  
	    public static CrashHandler getInstance() {  
	        return INSTANCE;  
	    }  
	    /** 
	     * 初始化 
	     *  
	     * @param context 
	     */  
	    public void init(Context context) {  
	        mContext = context;  
	        //获取系统默认的UncaughtException处理器  
	        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();  
	        //设置该CrashHandler为程序的默认处理器  
	        Thread.setDefaultUncaughtExceptionHandler(this);  
	    }  
	  
	    /** 
	     * 当UncaughtException发生时会转入该函数来处理 
	     */  
	    @Override  
	    public void uncaughtException(Thread thread, Throwable ex) {  
	        if (!handleException(ex) && mDefaultHandler != null) {  
	            //如果用户没有处理则让系统默认的异常处理器来处理  
	            mDefaultHandler.uncaughtException(thread, ex);  
	        } else {  
	            try {  
	                Thread.sleep(3000);  
	            } catch (InterruptedException e) {  
	                Log.e(TAG, "error : ", e);  
	            }  
	            //退出程序  
//	            android.os.Process.killProcess(android.os.Process.myPid());  
	            System.exit(1);  
	        }  
	    }  
	  
	    /** 
	     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成. 
	     *  
	     * @param ex 
	     * @return true:如果处理了该异常信息;否则返回false. 
	     */  
	    private boolean handleException(Throwable ex) {  
	        if (ex == null) {  
	            return false;  
	        }  
	        //使用Toast来显示异常信息  
	        new Thread() {  
	            @Override  
	            public void run() {  
	                Looper.prepare(); 
//	                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG).show();  
	                Looper.loop();  
	            }  
	        }.start();  
	        //收集设备参数信息   
	        collectDeviceInfo(mContext);  
	        //保存日志文件   
	        saveCrashInfo2File(ex);  
	        return true;  
	    }  
	      
	    /** 
	     * 收集设备参数信息 
	     * @param ctx 
	     */  
	    public void collectDeviceInfo(Context ctx) {  
	        try {  
	            PackageManager pm = ctx.getPackageManager();  
	            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);  
	            if (pi != null) {  
	                String versionName = pi.versionName == null ? "null" : pi.versionName;  
	                String versionCode = pi.versionCode + "";  
	                infos.put("versionName", versionName);  
	                infos.put("versionCode", versionCode);  
	            }  
	        } catch (NameNotFoundException e) {  
	            Log.e(TAG, "an error occured when collect package info", e);  
	        }  
	        Field[] fields = Build.class.getDeclaredFields();  
	        for (Field field : fields) {  
	            try {  
	                field.setAccessible(true);  
	                infos.put(field.getName(), field.get(null).toString());  
	             //   Log.d(TAG, field.getName() + " : " + field.get(null));  
	            } catch (Exception e) {  
	                Log.e(TAG, "an error occured when collect crash info", e);  
	            }  
	        }  
	    }  
	  
	    /** 
	     * 保存错误信息到文件中 
	     *  
	     * @param ex 
	     * @return  返回文件名称,便于将文件传送到服务器 
	     */  
	    private String saveCrashInfo2File(Throwable ex) {  
	          
	        StringBuffer sb = new StringBuffer();  
	        for (Map.Entry<String, String> entry : infos.entrySet()) {  
	            String key = entry.getKey();  
	            String value = entry.getValue();  
	            sb.append(key + "=" + value + "\n");  
	        }  
	          
	        Writer writer = new StringWriter();  
	        PrintWriter printWriter = new PrintWriter(writer);  
	        ex.printStackTrace(printWriter);  
	        Throwable cause = ex.getCause();  
	        while (cause != null) {  
	            cause.printStackTrace(printWriter);  
	            cause = cause.getCause();  
	        }  
	        printWriter.close();  
	        String result = writer.toString();  
	        sb.append(result);  
	        try {  
	            long timestamp = System.currentTimeMillis();  
	            String time = formatter.format(new Date());  
	            String fileName = "crash-" + time + "-" + timestamp + ".log";  
	            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {  
	                String path = "/sdcard/crash/";  
	                File dir = new File(path);  
	                if (!dir.exists()) {  
	                    dir.mkdirs();  
	                }  
	                FileOutputStream fos = new FileOutputStream(path + fileName);  
	                fos.write(sb.toString().getBytes());  
	                fos.close();  
	            }  
	            return fileName;  
	        } catch (Exception e) {  
	            Log.e(TAG, "an error occured while writing file...", e);  
	        }  
	        return null;  
	    }  
//	@Override
//	public void uncaughtException(Thread thread, Throwable ex) {
//		// TODO Auto-generated method stub
//		
//	}

}
